Get buy-in from employees
You will need to set up a training session for your departments so they are fully aware of the new processes, expectations, and next steps. Come prepared with a step-by-step task list, “due dates”, and any filing formulas/systems you want them to stick to that can be easily referred to later on. Be sure to set clear expectations and set goals for your teams; unspoken expectations = unmet expectations. I suggest setting clear and achievable goals, like having 2 filing cabinets digitized by end-of-week, and so on until everything is completed. Since digitizing documents can be a long and tedious process, consider incentivizing your teams! Offering a prize (catered lunch, half-day Friday, etc.) to the first team done, or setting it up in a bracket, team vs. team style until you have one ultimate winner could help bring in some much-needed excitement.